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Such a substance is especially called a compound.
The particles in a pure substance are all "identical".
No it isn't. An element is one kind of atom, it is not made of different kinds of atoms.
You think probable to a binary molecule.
Mainly salts of different kinds.
pituitary glands salivary glands
I'm not sure that Fleming *invented* anything - he's known for *discovering* the antibiotic penicillin by observing that the Penicillium mold secretes a substance that kills certain kinds of bacteria.
kinds according structures and use of the substance
They release hormones (three different kinds) in response to stress.
mammary glands; hair; warm blooded
Such a substance is especially called a compound.
The pancreas secretes digestive substances into the small intestine to help digest certain kinds of nutrients.
Yes, it is correct.
Mole is the unit for amount of a substance in SI.
Pure water, sodium chloride, sucrose, list goes on...
No, an element is only one substance. For example for silver has the symbol Ag. this tells us that silver is an element it consists only of silver it does not contain any other substance. Water has the symbol H2O this tells us that water is made up of oxygen and hydrogen it consists of more than one substance. Silver is an element, water is a compound It is not correct to say a substance is made up of two kinds of matter. Kinds of matter means a gas a liquid or a solid
a compound